History And Science Of The Atom

In this experiment, you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment," Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass, he developed the nuclear model of the atom. Next, he set out to determine the relative size of the nucleus compared to the rest of the atom. He reasoned that the smaller the nucleus, the less likely it was to be hit by an alpha particle. This led to a simple comparative ratio:

In the year 400 B.C, the first atomic structure was made. It was thought that everything could be broken down into very small particles. These small particles are atoms, which it is what atomic structure is all about. Atomic structures are visual demonstrations used to help understand how an atom looks like on the interior in the inside and what it consists of. Over the years, atomic structures have greatly improved and are still doing so. However, the first atomic structure had a great impact on science and on other observations made about atoms.

  The understanding of the structure of atoms has changed throughout history. The first documented case of the discovery of atoms dates back to 450 B.C with two Greek philosophers, Leucippus and Democritus (Doc. 1). This was only a theory; however, they proposed the idea that all matter is made up of atoms.

Around 2,500 years ago, Democritus and his partner Leucippus were the first ones to develop the atomic theory in written history. Their theory proposed that every kind of matter was made up of tiny particles, which were named atomos, which means that it is indivisible. This meant that Democritus and Leucippus thought there were little particles of everything, but, the next breakthrough in atomic theory wasn’t made until the early 1800s with a french chemist by the name of Antoine Lavoisier, he was the one who came up with the idea of the law of the conservation of mass, which states that matter stays the same even when it changes shape or form. Then, James Dalton said that all matter was made up of atoms, which were indivisible, and unbreakable.

What is the atomic structure you may ask? Well, it’s the law stating the structure of an atom. It is composed of a positively charged nucleus containing a certain amount of protons (positive), neutrons (neutral charge), and electrons (negative). The amount of each subatomic particle (proton, neutron, and electron) all depend on what the element is. Now although this statement may seem fairly simple it was most definitely not. People have been studying the atomic structure for more than 300+ years and are still studying it. So after reading this you may wonder who even made this atomic structure up. After hundreds of years of research there is not any one individual who made the structure up but roughly

During the early 1940’s atomic science had just began to mature. Many people were exploring the powerful mystery of the atom. Two of those people were Eugene Booth and John Dunning, who, in 1941, synthesized uranium-235. Immense scientific growth followed their contribution, since it allowed for nuclear fission (Griffith). In the years following this discovery, nuclear science took a turn. Once only used as a constructive power source, atoms began being explored for their destructive power. In 1942 the United States government funded the Manhattan Project that sole goal was to develop a nuclear bomb. The initiator for this endeavor was surprisingly the famous scientist Albert Einstein. He wrote to Franklin D. Roosevelt , and tipped him off

After the war in Europe had ended, the United States’ needed to terminate their participation in World War II. In order to end the war, military action had to be taken against the Japanese so cause them to surrender. The only issue was finding a way to carry out an attack that would have low casualties and funding. During the war, the Japanese soldiers fought to the death, including mass suicides and attacks by kamikazes, or suicide bombings in planes. A land invasion, such as D-day, could have caused a large death toll on Japan, and also cause many Americans to lose their lives. The United States believed that to end the war they must make a critical blow to the Japanese. Thus the Hiroshima and Nagasaki bombings were born. The bombings

The Atomic Age, composed of complex and controversial issues, has forever changed our world and the way in which we live.

On July 16, 1945 a new age was beginning. The "atomic age", also known as the "atomic era" is the period in history that follows the detonation of the first atomic bomb. It is December 7, 1941 and a new chapter in the history of the United States is about to start. The sky is crowed by Japanese fighter planes, bomb and bullets rain all over the American naval base at Pearl Harbor resulting in considerable human and material losses. The American territory has already fell under the attack that would lead America to join World War II. Led for almost four years of confrontation as well as death and the need to eradicate the Japanese army and therefore, end the devastating world war, the United states build the most powerful weapon the world had

During the first week, I became acquitted with the JMABC policies and procedures as well as getting a rough idea of the collection as a whole. My first task was to help finish up the new subject thesaurus JMABC was developing for their AtoM website. This involved removing certain terms that were deemed irrelevant by the archivist and adding in terms specific to our collection, such as Jewish holidays and life events. I then inputted these terms into the AtoM website, which can be viewed here. Please note that the subject thesaurus is an on-going project and has been further developed by other archives assistants.

A nucleus is part of an atom, and a nucleus is made of three things, protons, electrons and neutrons. Protons have a positive charge and usually has the same amount of neutrons, with a neutral charge. Then there are electrons, with a negative charge, which usually orbits the nucleus and creates “shells”. There are three types of atoms, you have atoms, isotopes, and ions. The ion usually has a positive charge, or it has more protons than electrons. Then we have Isotopes, which have a negative charge, or more electrons than protons. Finally, there are neutral atoms, which have equal numbers of protons and electrons with a neutral charge. With atoms comes an atomic number, which is a number of protons and electrons. Then a number of protons and

The Atomic Theory is a theory that explains what matter is made of. The Atomic theory states that matter can’t be divided as it is made up of minute particles called atoms that cannot be separated. The very word atom is derived from the Greek word Atmos which means indivisible.

Rutherford’s discovery of the nucleus allowed him to develop a new atomic model, the planetary model. In this model, the centre of the atom is the nucleus. The nucleus contains most of the mass and all of the positive charge of the atom. Electrons circle around the nucleus like planets do around the sun. Positive protons in nucleus and electrons in orbit around nucleus.

The Discovery of the Atom first came from the Greeks which made a theory “The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with the Greek philosopher Leucippus of Miletus and his student Democritus of Abdera in the 5th century B.C. (The word atom comes from the Greek word atomos, which means “indivisible.”)” (InfoPlease Atomic theory)

Around 400 BCE was when the Greek philosopher Democritus, alone with his teacher Leucippus, the idea of the atom was born (the word atom comes from the Greek word “atomos” or “atomon” meaning “that which cannot be split”). This was a completely new concept, and Democritus’s theory stated that atoms were indestructible and homogenous, and different states of matter were made up of differently shaped atoms: solids had sharp and pointy atoms and liquids had large round atoms. Later these ideas would be proved inaccurate, however, this was the beginning of the discovery of the atom even though the people of this time had no instruments capable of testing the theory.